Keep safe working load of derricks.

让吊杆在安全负荷下工作。

youdao

What's the safe working load of each derrick?

每根吊杠的安全工作负荷是多少？

youdao

What is the safe working load of the bitts in the bow area?

船首区域缆桩的安全工作负荷?。

youdao

What is the safe working load of the bitts in the bow area?

船首区域缆桩的安全工作负荷?。

youdao